Article of manufacture made of waste cones



v lill C ARTICLE OF MA K- DUNLAP lNUFACTURE MADE 0F wA Flled July 15 1926 STE CONES June 49 19290 anon" e 1;

Patented June 4, 1929.

UNITED STATES 1,716,215'v PATENT OFFICE.

CHARLES K. DUNLAP, OF HARTSVILLE, SOUTH CAROLINA, .ASSIGNOR TO SONOCO PRODUCTS COMPANY, OF HARTSVILLE, SOUTH CAROLINA, A CORPORATION OF SOUTH CAROLINA.

i .ARTICLE OF MANUFACTURE MADE OF WASTE CONES.

Application filed July 13,

The present invention relates to fiber poles or tubes and its object is to provide, as an article of manufacture, a fiber pole or tube which shall be light in weight, strong, hard in texture and lresistent to abrasion, but which maybe at the same time easily and inexpensively fabricated.

Many millions of paper cones aremanufactured annually for the needs of the textile industry, these cones being used, chiefly in connection with knitting machines, the individual threads to be knitted being Wound on separate cones and a plurality of such cones and windings being mounted on the knitting machine duringr the knitting operation. When the thread of any particular cone is exhausted this cone is removed from the knittinr machine and a fully wound cone put iny its p ace. 'Ihe discarded cones may be used again but generally are not, it being the almost universal practice to dispose of these cones as Waste paper after one using. They are generally sold to paper mills and reduced to pulp for fabrication into fresh cones or into other articles of manufacture.

In the manufacture'of the cones also there is a certain percentage found to be imperfectly formed and therefore unsuitable for the purposes intended. It has been the general practice likewise to return these imperfect cones to the pulp mills for conversion into pulp and again into paper articles.

I have discovered that by nesting paper cones and firmly securing them together by a suitable paste or mucilage, a very satisfactory pole or rod may be made which may be used for various pinposes but which are particularly suitableffor use as carpet poles. I have likewise found that by truncating the con-es prior to nesting them and securing them together a very satisfactory tube may be fabricated which is strong and yet at the same time light in Weight. Such tubes may have many uses in the mechanical arts and are well adapted to be used as conduits for electric Wires or the like, having a very considerable dielectric strength. By grinding the outer surface of the pole and the surfaces of the tube, either inner or outer or both, may be rendered truly smooth and cylindrical but this need not be done, of course, Where truly cylindrical surfaces are not required. By impregnating the pole or tube after fabrication with a hardening solution, for instance a so- 1926. Serial No. 122,245.

lution of sulphur, the fiber may be renderedy harder and the articles made much more durable.

The invention is not limited Withrespect to the type of cone which may be employed, although in actual practice I yprefer to use cones of the type manufactured upon the cone winding mandrel described and claimed in Patent No. 1,482,849 issued February 5, 192i to G. II. Kennedy. In the above mentioned patent a mandrel is disclosed upon which cones having a full length inner deckled or feathered edge may be quickly and easily manufactured or fabricated. The inner Walls of such cones are truly conical and this is of course of great advantage in forming a manufactured article in which the cones must be, so far as possible, truly nested. Various types of cones, however, may be employed in making up the article and these cones may be either used cones or imperfectly formed cones, or may be new ones, as desired, the invention not being limited in this respect.

By Way of example, I illustrate in the accompanying drawings a portion. of a solid pole or rod formed ofthe nested cones and a portion of a tube formed in the same manner, Figs. 1 and 2 being respectively a side elevation, partly broken away, of the rod, and an end view of the same, and Figs. 3 and 4 being respectively a side elevation of the tube, partly broken away, and an end view of the same. In the practice of the -invention cones of the type described, and preferably those with inner walls truly circular in cross-section, are nested as shown in Fig. 1, the contiguous walls of the respective cones being coated with adhesive prior to their assembly. Any suitable paste or glue may be employed for securing the cones together. Pressure may be used to effect the complete nesting of the cones if desired and the entire column may be kept under a certain degree of pressure until the paste or glue has completely dried. The pole may be trimmed at its ends as shown. It may be further submitted to a hardened process as by treating with a sulphur solution in order that the fibers be made hard, the surface rendered resistent to abrasion land the resistance of the pole to bending materially increased. It will be observed that if the ends of the pole be uncut, one end will present a conical axial recess and the other a conical extension. This enables the manufacturer to produce short poles of one standard length and permits at the same time the user to join severalshort lengths together to form a long-l er pole of the desired length by simply piecing short sections together.

The tube shown in Figs. 3 and 4 is formed by nesting. truncated cones and securing them together by a suitable adhesive. Preferably this tubek is likewise treated with a hardening solution. Both the pole and the tube may be ground exteriorally to have a truly cylindrical outer surface, the tube of Fig. 3 being shown partially cylindrical exterior-ally. The tube may be ground nteriorly also as shown in Fig. 3 so that a smooth cylindrical inner surface is presented. When thus fabricated, the articles mentioned may be used for any purpose to which they are suited. They are durable, light, very strong, will not Warp or crack, have great dielectric strength and have the advantage of cheapness. The

invention is not limited to articles made of the exact type of cone illustrated. Such cones may have more or less taper and need not have their small ends closed. The means for securing the cones together may vary Widely and the cones may be either those normally termed Waste cones in the textile industry or may be especially fabricated for the purpose.

Having thus described the invention, what I claim as new and desire to be secured by Letters Patent is l. As an article of manufacture, a light, strong and transversely rigid pole comprising a plurality of nested paper cones firmly secured together by an adhesive and treated with a hardening solution.

2. The method of fabricating a light, strong, abrasion-resisting and transversely rigid pole of paper fiber consisting in nesting a plurality of paper cones, firmly securing them together vby means of an adhesive, and subjecting the pole thus assembled to a hardening treatment.

In testimony whereof I hereunto aifix my signature.v

4CHARLES K. DUNLAP. y 

